Narrative:

At first I was very vigilant about maintaining our position below the bottom shelf of los angeles class B airspace, which was 5000 ft MSL. Also, we were in constant contact with socal approach receiving TA's. Nearing the end of the flight, I had my student close his eyes and continue flying the aircraft as I called out various instructions, ie, turn left, turn right, climb, descend. The purpose was to ensure the onset of vertigo in the student. We eventually developed a significant climbing and turning unusual attitude and just before the onset of a stall, I instructed the student to recover. He did so effectively, but a few seconds later socal gave us a callout asking for our altitude. I knew immediately we had breached the bottom shelf of lax class B airspace. The controller, although quick to alert us to our transgression of his airspace, was not overly harsh in his response. He offered to coordination a class B clearance for us and admonished us to be careful of the class B parameters in that area. We immediately descended below 5000 ft MSL and returned to our home airport. I discussed the incident with my student upon our return to hawthorne airport and told him that I had allowed my awareness of our position in relation to the class B airspace to slip while we were executing the final series of unusual attitudes. I told him why I had him perform the unusual attitudes over land rather than over the water, which was due to my concern of the possibility of vertigo at night over water. I used the incident to explain to my student the NASA ASRS reporting system and the purpose behind it, and told him that I would be filing a report as a result of our experience.

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Original NASA ASRS Text

Title: A C172 INSTRUCTOR AND STUDENT VIOLATED LAX CLASS B AIRSPACE WHILE PERFORMING TRAINING MANEUVERS.

Narrative: AT FIRST I WAS VERY VIGILANT ABOUT MAINTAINING OUR POS BELOW THE BOTTOM SHELF OF LOS ANGELES CLASS B AIRSPACE, WHICH WAS 5000 FT MSL. ALSO, WE WERE IN CONSTANT CONTACT WITH SOCAL APCH RECEIVING TA'S. NEARING THE END OF THE FLT, I HAD MY STUDENT CLOSE HIS EYES AND CONTINUE FLYING THE ACFT AS I CALLED OUT VARIOUS INSTRUCTIONS, IE, TURN L, TURN R, CLB, DSND. THE PURPOSE WAS TO ENSURE THE ONSET OF VERTIGO IN THE STUDENT. WE EVENTUALLY DEVELOPED A SIGNIFICANT CLBING AND TURNING UNUSUAL ATTITUDE AND JUST BEFORE THE ONSET OF A STALL, I INSTRUCTED THE STUDENT TO RECOVER. HE DID SO EFFECTIVELY, BUT A FEW SECONDS LATER SOCAL GAVE US A CALLOUT ASKING FOR OUR ALT. I KNEW IMMEDIATELY WE HAD BREACHED THE BOTTOM SHELF OF LAX CLASS B AIRSPACE. THE CTLR, ALTHOUGH QUICK TO ALERT US TO OUR TRANSGRESSION OF HIS AIRSPACE, WAS NOT OVERLY HARSH IN HIS RESPONSE. HE OFFERED TO COORD A CLASS B CLRNC FOR US AND ADMONISHED US TO BE CAREFUL OF THE CLASS B PARAMETERS IN THAT AREA. WE IMMEDIATELY DSNDED BELOW 5000 FT MSL AND RETURNED TO OUR HOME ARPT. I DISCUSSED THE INCIDENT WITH MY STUDENT UPON OUR RETURN TO HAWTHORNE ARPT AND TOLD HIM THAT I HAD ALLOWED MY AWARENESS OF OUR POS IN RELATION TO THE CLASS B AIRSPACE TO SLIP WHILE WE WERE EXECUTING THE FINAL SERIES OF UNUSUAL ATTITUDES. I TOLD HIM WHY I HAD HIM PERFORM THE UNUSUAL ATTITUDES OVER LAND RATHER THAN OVER THE WATER, WHICH WAS DUE TO MY CONCERN OF THE POSSIBILITY OF VERTIGO AT NIGHT OVER WATER. I USED THE INCIDENT TO EXPLAIN TO MY STUDENT THE NASA ASRS RPTING SYS AND THE PURPOSE BEHIND IT, AND TOLD HIM THAT I WOULD BE FILING A RPT AS A RESULT OF OUR EXPERIENCE.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.